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The Khao Sok National Park was established in 1980 to protect one of the oldest rainforests in the world and covers an area of 739 km2.

It’s Thailand’s wettest region with an annual rainfall of 3.500 mm. The reason is the limestone mountain range from north to south. It gets hit by the monsoons from the Andaman Sea and the Gulf of Thailand between late April and end of November. Therefore, the driest months are December to April and the most popular ones.

Weather

The dry season last from December to late April. Anyway, showers can also occur in the dry season and especially in the rainforest. The hottest months with high humidity are March and April with temps around 34°C. The rainy season starts late April and lasts until the end of November. Most precipitation from May to July and from October to November. 

Swimming in the Khao Sok National Park
Take a refreshing bath

Avoiding Crowds

It's pretty busy around the visitor center, and it takes some time to purchase the entrance ticket for 300 Baht / roughly 8 € / 9 $. The ticket is valid for 24 hours. As soon as you start hiking deep into the jungle the crowds thin out. At the beginning of the Ton Gloy Waterfall Trail, it's pretty crowded, but also along this popular hike, fewer people are along the trail after around an hour hiking.

Bird in the Khao Sok National Park

Seasons in the Khao Sok Rainforest
  • To experience the vivid rainforest May is the best month.
  •  For birding, the monsoon season is the best time when they spread out and the very best month is May when the mating season starts. The dry season is not recommended for birding.
  • For hiking, the dry season might be the best time. The trails are slippery after heavy rainfall and some parts are closed during the rainy season.
  • Rafflesia Kerrii is in bloom between January and March for about 5 days only. Very difficult to predict.
  • More mosquitos during the rainy season and leeches are on the forest floor at least until November.
Forest
TH Thailand